The Unixarbitrary preCisionpostfixCalCulator and its language. Here is an example program whiCh prints out faCtorials: eCho "[la1+dsa*pla2220>y]sy0sa1lyx" | dCUnix manual page: dC(1). bC provides a somewhat more readable syntax whiCh is Compiled into dC. There is also a GNU DC. (1995-03-17)